Range



p 9 I A. KARGES 2,330,495

- RANGE I Filed July 12, 1941 2 Sheets-Sheet 1 Inventor.

A/lerf Kar'ges.

Sept. 28, 1943. I KARGEs 2,330,495

RANGE Filed July 12, 1941 2 Sheets-Sheet 2 A/er/ Kaye:

& I

I n1/entor'. I

Patented Sept. 28, 1943 RANGE I Albert Karges, Woodstock, Ontario, Canada Application July 12, l941,-Serial.No. 492,079

In Canada July 22, 194-0 1 6 Claims. gor. mgr-'1 The principal objects of this invention are-to provide an improved form of range which will provide for an efficient heat distribution between the firebox and oven and to provide a form' of firebox which will enhance the heat.;interc hange and affect a considerable economy infuel ,consumption.

A further and important object is to provide a range in which the oven will not only be efficiently heated but in which provision; is made whereby the range may be utilized as an eflicient heating medium for air in a room and/or for maintaining a supply of hot water. I I

The principal features of the invention reside mainly in the novel construction of the firebox with air-circulating passages and heat-interchange areas in conjunction with air-circulating passages about the oven separate from the flue passages and through which highly heated air is directed in communication with the firebox-passages and heat-interchange surfaces.

A further and important,featureresides in'the novel provision of air inlet passages in the wall of the firebox for directing combustion-supportingair in preheated form to the space below the grates and above the'fire. v

A still further feature of the invention resides in the provision of air inlet and outlet grilles in the front wall of the stove casing topcrmit a free circulation of air upwardly about the firebox and outwardly into the room and in the further provision of a heating chamber at. the rearward end of the oven adapted to be option ally used either for maintaining a supply 'ofhot water or as a heating chamber. for air.

In the drawings Figure 1 is a perspective view, brokenaway in part, of a range constructed in accordance with the present invention.

Figure 2 is a perspective view of the firepot unit.

Figure 3 is a pot. c

Figure 4 is a fragmentary. perspective view of the rear portion of the range'illustrating the rear perspective view of the fireheating chamber at the rear of the oven and with.

a water-heating tank therein.

Figure 5 is a view similar to Figured showingthe water-heating tank removed to clear the heating chamber for air-heating purposes.

Figure 6 is a part vertical section taken on the line'65 of Figure 1. c

In the preferred form of the invention shown the range here shown having an outercasingl of substantially rectangular form is provided with a firepot unit A spaced forwardly from the oven B behind which oven is arranged a heating chamber C.

The firepot A is of special integral construc tion having air-heating passages 2, 3 and 4 incorporated in the end walls thereof and the rear wall is formdwithvertical heat-exchange fins 5. The firepot A rests in a sealed manner on the ash-pit boxstructure-G and the air-heating passages3 open downwardly-into the interior of the ash-pit, such passages having inlet ports .3. opening thoughthe'frontwall I of the firepot.

pair of draft control members 8 are here shown mounted on a rod 9 slidablymounted in bosses Hi so that by sliding the rod 9 the volume of air entering the ports 3' may be accurately controlled. A handle extension H is provided on the rod which projects through a slot 12 in the front wall l 3.of the range casing.

The oven-B comprises inner and outer walls I send I5 respectively-forming therebetween a circulating. passage I Bfor hotair, the oven being.

covered at the top by a plate H which closes .the passages H5 at the .upper end and also overlaps the heat-radiating fins or flanges 5 of. the firebox.

Each of the air-heating passages .2 in the end walls of the firepot is provided with an air inlet port 2? at the bottom and an air outlet port 2" at the top. These ports open directly into the forward air-circulating passage I .6.

'Airinlet openings .."|8 are provided in the inner front wall l4 adjacent the top providing communication from the upper end of the forward air passage'lfi into th oven interior and .air outlet openings!!! are provided in the upper end of the rear wall l4 leading to the rearwardaircirculating passage I6.

A series of outlet openings 20 are alsoprovided in the rear wall l4 adjacent the bottom also leading into the passage l6. and aseries of, openings 2 may also advantageously be arranged in the inner bottom wall. of the oven adjacent the front edge.

With this arrangement of ports andpassages it'pwill be apparent that the air in the passages 2 of the firebox will be highlyheated so that it will be caused to pass out through the upper port 2" and across the forward air passage [6 to the openings- 18 directly into the oven interior. Within the oven this highly heated air will be distributed in an eifective manner by outward movement toward the respective passages I9, 20 and 21', eventuallyreaching the air-circulating passageil fi, whereupon it will be returned in the direc-tion'o'f the arrows. A proportion of the returned air will, on reaching the ports 2', enter the heating passages 2 and be reheated, while the remaining'volume of air will pass directly upward in the forward air passage I 6 indirect heat-exchange -contact with theheat-radiating fins 51:0 55;

again mingle with the highlyheated air passing out through the ports 2".

It will be noted that in this way the major sur-" faces of the oven are heated with a clean airflow and; due to the one piece construction of the firebox, there will be no possibility of smoke or.

flue gases reaching the oven interior, and an effective distribution of heat to the oven will be accomplished and the extensive contact of the air with the firepot unit will prevent over-heating of the latter.

The passages 4 in the firepot A are provided with front inlet ports 4' and a series of air-discharge orifices 4" are arranged to direct heated air from the passages 4 inwardly over the fire to enhance combustion.

A baffle 22 extends transversely above the plate I! from the forward side of a direct flue outlet 23, the length of the baffle 22 being equalto substantially half the width of the plate l1, and a rearwardly extending baflie 24 is arranged to induce the hot gases of combustion to flow rearwardly over the door-adjacent side of the oven and return in a direction of the arrows on the opposite side of the baflle 24 to the direct flue outlet 23.

A wall 25 is spaced from the outer rear wall l of the oven and this connects with a wall 26 extending in spaced relation below the outer bottom wall P5 of the oven, forming a flue passage 21.

An indirect flue outlet 28 has a baffle plate 29 similar to the bafile plate 22 extending transverse- 1y from the rearward edge between the outer bottom wall l5 of the oven and the .wall 26. Thus when the direct flue outlet 23 is closed,,by the usual damper mechanism, the hot gases of combustion will be caused to pass over the plate I! and downwardly into the flue passage 21 at the rear of the oven and then forwardly in the passage 21 between the walls l5 and 26 below the oven in a circuitous manner about the baiile 29 and finally out through the indirect flue outlet 28 so that there willbe an effective heat interchange between the hot gases of combustionand the air stratum Within the circulating passage I6.

According to the present invention the heating chamber C is capable of optional use either for water or air-heating purposes, and onreference particularly to Figures 4 and 5 this double utility will be apparent.

In Figure 4 I have shown a water-heating container 30 arranged in the chamber C in heat-exchange contact with the flue wall 25, the container being provided with a swivel discharge spout 3!. A support 32 formed of a length of rod bent into U-shape form is slidably mounted in openings 33 in the stove structure so that it may be extended to form a convenient support for a dish or the like being filled from the spout 3|, after which the support may be easily moved into the position indicated in Figure 5.

The chamber C is provided with a removable cover 34 and a grilled bottom 35, and when a water container as shown at 30 is arranged in the chamber C a removable plate 36 will be arranged over the grille bottom 35 to close the same against entrance of air. However, when it is desired to utilize the chamber 0 for air-heat-' ing and circulating purposes, the plate 36 is re so that an effective circulation of air about the outer surfaces of the firebox will be achieved, and the heat absorbed in this manner will be utilized in heating the room.

If it is desired to heat water by direct heatinterchange with the firebox unit this may be accomplished by providing a water-heating unit 39 as represented in Figure 2, which unit will flatly abut the front wall of the firebox and will heat the water by direct heat-interchange therewith.

While I have shown and described a preferred structure modifications may be resorted to without-departing from the essential spirit of the invention.

A range such as described will be highly eflicient and will utilize to maximum advantage the heat value of the fuel being burned and, due to the extended heat-interchange relation between the firepot and the air flows contacting therewith, the-outer casing of the stove will be maintained at a comparatively low temperature.

What I claim as my invention is:

l. A range having a firepot formed with air ducts in the walls thereof, an oven having openings communicating with the air ducts in said firepot, and means for directing a circulation of air from the firepot ducts into the interior of said oven and for returning same from the oven interior to said firepot ducts in a continuous oven-heating circuit.

2. A range having a firepot formed with air ducts in the walls thereof, an oven having openings communicating with the air ducts in said firepot and openings leading from the oven at different levels to effect the distribution of the heated air within the oven, and means for directing a circulation of air from the interior of said oven and for returning same from the oven interior to said firepot in a continuous ovenheating circuit.

3. A range as claimed in claim 2 in which the air heated in the firepot ducts is directed into the upper end of the oven interior adjacent to the firepot and said outlet openings lead from the oven adjacent the upper and lower levels thereof.

4. In a range having an oven, means forming an air-circulating passage about said oven, a flue passage separate from and arranged outside of said air passage, a firepot having heat-exchange surfaces disposed in said air passage, ducts arranged in the ends of said firepot for diverting a portion of the air from said air passage around the oven into heat-exchange relation with the ends of said firepot, and means for conducting the heated air through the interior of the oven.

5. A range as claimed in claim 4, in 'which said firepot is formed in one piece with airheating passages cast in the ends thereof, said passages having inlet and discharge ports connected with the air-circulating passage surrounding said oven at respectively different levels.

6. A range as claimed in claim 1 having a secondary wall spaced outwardly from the oven wall proper and forming therewith a passage at the rear, bottom and front of the oven, said passage being in direct communication with the oven interior at the upper level of the oven at the 'front and back respectively, and-means for directing hot gases of combustion from the firepot over the oven and on the outward side of said second- 

